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SCOTTY WOOD FURNACE – INSTRUCTION MANUAL
Scotty
Oct-06
11
2.4.1 COMBUSTION AIR SUPPLY
Air inlets of at least 200 square inches free area (1.5 in
2
/1000Btu) must be provided to
the room occupied by the wood fired or oil fired furnace. These fresh air inlets must
provide or allow free access of fresh outside air to the furnace. At no time or under any
circumstances can a wood or oil-burning appliance be starved of combustion air.
The appliance must at all times be able to maintain the approved stack draft. The
barometric draft regulator must be installed on the furnace smoke pipe in the same
room or at least in such a way that there is unrestricted free passage of air between the
combustion air inlet to the furnace or burner and the barometric draft regulator.
It is important to provide adequate combustion air to the furnace. It may be necessary
to add a ventilator to an exterior wall of a closed furnace room or an airtight basement.
Operating a wood or oil fired appliance with inadequate combustion air could be
hazardous.
2.4.2 FLUE PIPE & CHIMNEY
The furnace must be located to meet a minimum venting distance needed between the
furnace and the flue. It should also be ducted so that there are a minimum number of
elbows used. The flue pipe must be installed with a gradual rise of 1/2” or more per foot
from the furnace to the flue.
NEVER ALLOW THE SMOKE PIPE TO RUN DOWNHILL TO THE FLUE!
The smoke pipe and chimney should be at least 7 inches in diameter. The flue pipe or
a chimney may be of different cross-sectional area than that of the appliance smoke
pipe, provided that sufficient draft is available at the appliance. Space must be provided
around the smoke pipe and the back of the furnace to allow easy access for the
purpose of cleaning. Smoke pipes must not be lighter than 24 gauge black steel. All
pipes must be securely fastened with at least 3 sheet metal screws at every joint, and
properly supported.
Always meet or exceed flue pipe clearance specifications - 18” clearance from flue pipe
to combustibles in all directions.
Connect the furnace only to an approved chimney suitable for solid fuel appliances and
capable of venting the product of combustion. The chimney must be installed with
proper clearances above roof and from adjacent structures and trees. If a masonry
chimney is used it must be in good condition and be equipped with a tile liner. Flue
thimble or flue pipe must not extend into the chimney flue, as it will reduce the draft.
Connect only to a flue or chimney capable of maintaining a negative draft of .05” wc at
all times and conditions.
WARNING: If this setting is exceeded it could cause a solid fuel fire to burn out of
control.